Non-equilibrium fluid-dynamics in the early stage of ultrarelativistic heavy-ion collisions

被引：55

作者：

Brachmann, J ^{[1
]}

Dumitru, A ^{[1
]}

Maruhn, JA ^{[1
]}

Stocker, H ^{[1
]}

Greiner, W ^{[1
]}

Rischke, DH ^{[1
]}

机构：

[1] DUKE UNIV, DEPT PHYS, DURHAM, NC 27708 USA

来源：

NUCLEAR PHYSICS A | 1997年 / 619卷 / 3-4期

关键词：

relativistic multi-fluid hydrodynamics; heavy ion collision; non-equilibrium; Baryon stopping; nucleon flow; shock waves;

D O I：

10.1016/S0375-9474(97)00182-6

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

To describe ultrarelativistic heavy-ion collisions we construct a three-fluid hydrodynamical model. In contrast to one-fluid hydrodynamics, it accounts for the finite stopping power of nuclear matter, i.e. for non-equilibrium effects in the early stage of the reaction. Within this model, we study baryon dynamics in the BNL-AGS energy range. For the system Au+Au we find that kinetic equilibrium between projectile and target nucleons is established only after a time t(cm)(cq) approximate to 5 fm/c similar or equal to 2R(Au)/(gamma cm). Observables that are sensitive to the early stage of the collision (like e.g. nucleon flow) therefore differ considerably from those calculated in the one-fluid model. (C) 1997 Elsevier Science B.V.

引用

页码：391 / 412

页数：22

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